Just to add my friends recent experience

She recently got negative POAS two days in a row but positive 3rd day and I told her to check the bin again - the negatives had turned faint positive.

The day - before her HCG blood test of over 200 - her POAS was negative but later turned positive (when she checked the next day).

The same thing happened to another lady I know - but test again with your first morning urine to be sure -it's most concentrated.

Fingers crossed.

Fiona - how is your sister doing ? I think about her often.